/*
    MolTK is a Python and C++ toolkit for protein sequence/structure alignment and visualization
    Copyright (C) 2011  Christopher M. Bruns

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
    
    Commercial users should ask about our dual licensing model.
    For questions contact: cmbruns@rotatingpenguin.com
*/

#ifndef MOLTK_PRINTABLE_H
#define MOLTK_PRINTABLE_H

#include <iostream>
#include <string>

namespace moltk {

/// moltk::Printable is an abstract base class to help streamline
/// string conversion in the moltk python bindings.
class Printable
{
public:
    virtual void write_to_stream(std::ostream& output_stream) const = 0;
};

    std::ostream& operator<<(std::ostream& output_stream, const moltk::Printable& printable);

} // namespace moltk

#endif // MOLTK_PRINTABLE_H
